The rice varieties with strong root system, large active absorption root surface and total root surface area had strong tolerance to copper poison.
根系发达、根系活跃吸收表面积及总吸收表面积大的品种，有较强的耐铜毒性。
There was not a significant difference in root surface area of rice by comparing with the control treatment.
鸭稻共作方式下水稻根系总长变化无明显规律，根系表面积与常规栽培方式下相比无显著差异。
There was not a significant difference in root surface area of rice by comparing with the control treatment.
鸭稻共作方式下水稻根系总长变化无明显规律，根系表面积与常规栽培方式下相比无显著差异。
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